Definitions

1. noun

Members of the audience at a rock concert, especially one by the American rock band The Mothers of Invention and the British rock band Pink Floyd.

“The audience was comprised of many moonmen, all eagerly waiting for the concert to begin.”

2. noun

People who live in or are associated with outer space, especially those in a science fiction context.

“The astronauts were treated as moonmen by the other space travelers.”